The Boss OS-2 OverDrive/Distortion Guitar Effects Pedal delivers killer separate overdrive and distortion effects that you can combine for cool blended effects! This integration gives you more options than using serially connected units. Best of all the OS-2 is designed to provide raunchy, hard distortion while maintaining the nuances of single-coil pickups. Level, Tone, Drive, and Color controls offer plenty of tweakability..